Fin rot

Fin rot in pond fish is a condition that damages the fins of the fish. It is easily recognized by frayed fins. In addition, the skin may become dull and bloody spots may appear near the tail. It occurs due to a weak condition of the fish that allows the bacteria Pseudomonas or Aeromonas to strike. This condition is particularly common in koi and goldfish. It also occurs in other pond fish, but these are less susceptible to it.

Fin rot treatment and prevention

Fin rot can be treated just fine, provided the disease is detected at an early stage. Special bactericidal drugs are available for this purpose. It is wise to quarantine the sick fish outside the pond.

It is better to prevent fin rot than to have to treat it. Daily supplementation with a good quality food can greatly reduce the risk of the disease. Supplementary feeding means providing the fish with extra food. Another cause can be poor water quality, or too many fish in the pond. The guideline is 50 cm of fish length per 1,000 liters of water. A good filter, equipped with activated carbon offers a solution because this carbon can purify all kinds of micro-fine dust particles from the water. It also filters out various pathogens.